ACCL Tone Generator & Probe Kit for Network and Coaxial CablesThe Tone Generator is very practical tool, which provides a single or dual tone signal, two test leads and 4 conductor modular cable. It generates a signal from one end and traces the cables from the other by Probe, even when cables was in bundle or hidden in a mess punch down blocks or wall plates. It is easy to be used to verify cables continuity, pair condition, line polarity and voltage in network cabling systems (Category 5 and Coax) and modular